USE OF NEW COMPOUNDS OF THE QUINOLINE SERIES AS GROWTH AND YIELD STIMULANTS OF AGRICULTURAL CROP

Background: Productivity is increased with breeding techniques and modes for obtaining highly productive cultivars, various agricultural activities, and the use of new technologies for growing planting material. Some of modes to increase productivity are simple. They use different growth stimulants. Many methods were developed to synthesize organic compounds that have stimulating biological activity and can be used as growth stimulants for agricultural crop. Aim: The purpose of this research was to study the effect of synthesized organic compounds of the general formula: 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2-dihydroquinoline and 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2,3,4-tetrahydroquinoline on growth indicators (by which we meant seed germination and plant height, length, width, and the number of leaves) and the yield of the agricultural crop. Methods: To identify the biological effects of the synthesized organic compounds, morphometric parameters of an annual vegetable crop (Solanum melongena L.) were selected. It is investigated seed germination, growth processes, and yield. Growth processes were studied by biometric indicators. Biometric indicators included the plant height, length, width, and the number of leaves. Results and Discussion: The most effective growth stimulators from compounds of the series 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2-dihydroquinoline and 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2,3,4-tetrahydroquinoline for common eggplant were revealed. The most effective substances for Solanum melongena are 1,2,2,4-tetramethyl-6-(1-piperidinylcarbothioyl)-1,2,3,4-tetrahydroquinoline hydrochloride and 4-[(1,2,2,4-tetramethyl-1,2-dihydro-6-quinolinyl)carbothioyl]-1-piperazinylcarbaldehyde hydrochloride in tested concentrations (0,01 %; 0,05 % and 0,1 %), as well as the compounds of the general formula: 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2,3,4-tetrahydroquinoline in concentrations of 0,05 % and 0,1 %. It was established that the synthesized chemical substances cause stimulation of the eggplant growth compared with existing commercial preparation. Compounds of the series 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2- dihydroquinoline and 1-alkyl-2,2,4-trimethyl-6-aminocarbothioil-1,2,3,4-tetrahydroquinoline increase the seed germination of Solanum melongena from 30 to 80 %, the vegetative mass - from 10 to 40 %, yield - from 28 to 46 %. Conclusions: Tetrahydroquinolines are most effective as stimulants of growth processes (and productivity) for common eggplant. Compounds containing a dihydro-6-quinolinyl substituent stimulate the growth and also increase the yield of Solanum melongena. The expediency of quinoline series compounds for the production of vegetable growing is shown. Used growth stimulators increase the adaptive potential of Solanum melongena.

USE OF NEW COMPOUNDS OF THE QUINOLINE SERIES AS EFFECTIVE STIMULANTS OF GROWTH PROCESSES

The results of a study of the action of compounds of the general formula: 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2-dihydroquinoline and 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2,3,4-tetrahydroquinoline are presented. The most effective growth stimulants from compounds of the series 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2-dihydroquinoline and 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2,3,4-tetrahydroquinoline for yellow rhododendron (Rhododendron luteum) and Ledebur rhododendron (Rhododendron ledebourii) were revealed. Rhododendron seedlings were counted to study laboratory germination and planted in crates in closed ground on 21 days after the start of the experiment. It was established that the synthesized chemicals cause stimulation of the growth of species of the genus Rhododendron in comparison with existing commercial preparations. The efficiency of using solutions of compounds of the series 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2-dihydroquinoline and 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2,3,4-tetrahydroquinoline and their concentrations. A method of using compounds of this series as growth stimulants is disclosed, which allows increasing seed germination of species of the genus Rhododendron from 20 to 50%, increasing the height of Rhododendron luteum seedlings from 18 to 63%, and Rhododendron ledebourii from 33 to 183 %. Dihydroquinolines are most effective for species of the genus Rhododendron. Compounds containing a dihydro-6-quinolinyl substituent stimulate the growth of these plants. The specificity of the action of growth stimulants is noted. The expediency of using quinoline series compounds for the production of planting material of ornamental plants for landscaping is shown. It is suggested the auxin activity of compounds of the general formula: 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2-dihydroquinoline and 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2,3,4-tetrahydroquinoline. It is assumed that compounds of the series 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2-dihydroquinoline and 1-alkyl-2,2,4-trimethyl-6-aminocarbothioyl-1,2,3,4-tetrahydroquinoline may have the stressprotective activity for species of the genus Rhododendron. The materials of the article are of practical value forbiologists, ecologists, plant growers.

SYNTHESIZED ORGANIC COMPOUNDS AS GROWTH STIMULATORS FOR WOODY PLANTS

The effect of synthesized organic compounds of 6-hydroxy-2,2,4-trimethyl-1,2-dihydroquinoline, its derivatives, and hydrogenated analogs on the height of seedlings of ornamental woody plants was studied. The height of seedlings as a morphometric parameter was measured 7 months after the start of the experiment. The pre-sowing seed treatment of Rhododendron ledebourii and Rhododendron smirnowii, with the studied compounds, demonstrated that dihydro- and tetrahydroquinoline with the concentration of 0.1% proved to be the most efficient. Dihydroquinolines at concentrations of 0.05 and 0.1% proved to have the strongest effect. Dihydroquinolines for perennial woody plants are more effective, then tetrahydroquinolines. The most efficient synthesized chemical compounds for Rhododendron contain benzoyl substitute. For Rh. ledebourii and Rh. smirnowii the most effective are the same synthesized chemical compounds: 6-hydroxy-2,2,4-trimethyl-1,2,3,4-tetrahydroquinoline, 6-hydroxy-2,2,4-trimethyl-1,2-dihydroquinoline, and 1-benzoyl-6-hydroxy-2,2,4-trimethyl-1,2- dihydroquinoline with concentrations of 0.01, 0.05, and 0.1%. These compounds, when applied with the presowing seed treatment of Rh. ledebourii and Rh. smirnowii, result in an increase in the height of the seedlings by 3.6-89.3% and 14.3-57.1%, respectively. The effect of synthesized chemical compounds of 6-hydroxy-2,2,4-trimethyl-1,2-dihydroquinoline and its hydrogenated analog on woody plants of the same genus is not speciesspecific. It is suggested using the compounds of 6-hydroxy-2,2,4-trimethyl-1,2-dihydroquinoline, its derivatives, and hydrogenated analogs as growth stimulators for Rhododendron. The compounds of the quinoline series were tested for genotoxicity by the cytological method in the model object (Betula pendula) and recognized as environmentally friendly. The cytogenetic responses for Betula pendula and Rhododendron are identical, so positive compounds influence for Betula pendula cells because of increased metabolic activity means the same for Rhododendron. Therefore, synthesized organic compounds can be recommended as effective growth stimulators.